To reduce a fraction to the lowest terms equivalent: divide the numerator and denominator by their greatest common factor, GCF
To calculate the greatest common factor, GCF:
- 1. Factor the numerator and the denominator (into prime factors), build their prime factorizations.
- 2. Multiply all their common prime factors, taken by the lowest exponents.
1. Factor the numerator and the denominator:
To factor a number (into prime factors) - or, in other words, to break it down to prime factors - or, in other words, to build its prime factorization: find the prime numbers that multiply together to get that number.
The prime factorizations:
7,758,686 = 2 × 13 × 298,411
7,758,686 is a composite number.
Written with exponents:
14,062,592 = 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 31 × 443 = 210 × 31 × 443
14,062,592 is a composite number.
7,758,686/14,062,592 =
(7,758,686 ÷ 2) / (14,062,592 ÷ 2) =
3,879,343/7,031,296
Yet another method to reduce the fraction
To reduce a fraction without calculating the GCF: factor its numerator and denominator, then all the common prime factors are easily identified and crossed out.
7,758,686/14,062,592 =
(2 × 13 × 298,411)/(210 × 31 × 443) =
((2 × 13 × 298,411) ÷ 2) / ((210 × 31 × 443) ÷ 2) =
(13 × 298,411)/(29 × 31 × 443) =
3,879,343/7,031,296
As a decimal number:
Simply divide the numerator by the denominator, without a remainder, as shown below:
3,879,343/7,031,296 =
3,879,343 ÷ 7,031,296 =
0.551725172714 ≈
0.55